KVM: PPC: Book 3S: XICS cleanup: remove XICS_RM_REJECT

KVM: PPC: Book 3S: XICS cleanup: remove XICS_RM_REJECT

BugLink: http://bugs.launchpad.net/bugs/1651248
Commit b0221556dbd3 ("KVM: PPC: Book3S HV: Move virtual mode ICP functions
 to real-mode") removed the setting of the XICS_RM_REJECT flag. And
since that commit, nothing else sets the flag any more, so we can remove
the flag and the remaining code that handles it, including the counter
that counts how many times it get set.

Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
(cherry picked from linux-next commit 5efa6605151b84029edeb2e07f2d2d74b52c106f)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>